#!/bin/bash

# ----------------------------------------------------------------------------
# c o n f i g u r a t i o n
# ----------------------------------------------------------------------------

DIARY=$HOME/diary
NOTES=$DIARY/Notes
DESKTOP=$HOME/Desktop

# ----------------------------------------------------------------------------
# s e t u p
# ----------------------------------------------------------------------------

ABS_OLD_YESTERDAY=$DIARY/`date +%Y/%m/%d -d '2 days ago'`
ABS_YESTERDAY=$DIARY/`date +%Y/%m/%d -d 'yesterday'`
ABS_TODAY=$DIARY/`date +%Y/%m/%d -d 'today'`
ABS_TOMORROW=$DIARY/`date +%Y/%m/%d -d 'tomorrow'`

if [ ! -d $DIARY ]; then
	echo "? Diary root directory does not exist"
	exit 1
fi

if [ ! -d $DESKTOP ]; then
	echo "? Desktop directory does not exist"
	exit 2
fi

# ----------------------------------------------------------------------------
# m a i n
# ----------------------------------------------------------------------------

mkdir --parents --mode 0700 \
  $NOTES \
  $ABS_YESTERDAY \
  $ABS_TODAY \
  $ABS_TOMORROW

for LINK in Yesterday Today Tomorrow Notes
do
    FILE=$ABS_OLD_YESTERDAY/$LINK
    if [ -L $FILE ]; then
        rm $FILE
    fi
done

LN_CMD="ln --symbolic --force --no-dereference"

$LN_CMD $NOTES         $ABS_TODAY/Notes
$LN_CMD $ABS_YESTERDAY $ABS_TODAY/Yesterday
$LN_CMD $ABS_TOMORROW  $ABS_TODAY/Tomorrow

$LN_CMD $ABS_YESTERDAY $DESKTOP/Yesterday
$LN_CMD $ABS_TODAY     $DESKTOP/Today
$LN_CMD $ABS_TOMORROW  $DESKTOP/Tomorrow

# ----------------------------------------------------------------------------
# end
# ----------------------------------------------------------------------------